Improvement in device for casting lugs and dovetails



UNITED STATES PATENT VGEEICE.

GEORGE YV. HERRIOK, OF STU Y VESAN T, NEW YORK, ASSIGNOR TO HIMSELF AND H. H. GIBBS, OF SAME PLAGE.

IMPROVEMENT IN DEVICE FOR CASTING LUGS AND DOVETAILS.

Specification forming part of Letters Patent No. 82,715, dated October 6, 1868.

To all whom it may concern:

Be it known that I, GEORGE W. HERRICK, of Stuyvesant, in the county of Columbia and State of New York, have invented a new and useful Improvement in Forming Molds forOastin g; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to a new and useful improvement in forming molds for castingvarious articles, and relates more especially to the forming of molds for casting catches on parts which require to be attached to other parts, Veither byswivel or dovetail connections.

The object of the invention is to obtain a means whereby the catches may be cast and formed without the necessity of iiling or any after manipulation whatever.

In the accompanying sheet of drawings, Figure l is a vertical section of a portion of a casting the mold for which was formed by my invention Fig. 2, a vertical section of the tool used for preparing a certain portion of said mold, Fig. 3, a vertical section of a casting composing a portion of a tea-kettle with its lid, the latter being connected to the former by a joint, the mold for which was prepared by my invention; Fig. 4,a vertical central section of the tool used in forming the mold for the same 5 Fig. 5, an inverted plan of a stove bottom and foot, the latter being connected to the former by a dovetail fastening; Fig. 6, an inverted plan of the tool used in forming the mold for the same; Fig. 7, a vertical central section of the same.

Similar letters of reference indicate corresponding parts.

A represents a portion of a casting, a stovetop or other article, which is to be secured to any fixture. This casting is provided with a pendent pin or projection, a, having a lateral spur, b, to serve as a catch or fastening to secure it to the fixture to which it is to be attached.

The mold for casting this spur bis formed as follows: The pattern is made precisely' like A, with the exception of the spur b, that not being on the pendent pinor projection a. after the mold is made, sand being employed for the purpose, as usual. The holein the moldfor casting'the spur bis formed by a tool, B. (Shown in Fig. 2.) This tool is composed of a hollow cone, c, having an upright, d, at one side of it, and in its upper part a transverse shaft, c, on which a lever, f, is fitted, the latter extending upward as high as the upright d and downward within the cone nearly to its bottoni, the lower end of the lever being provided with a lateral projection, g,`of the same size and shape as the spur b.

In the side of vthe cone c there is an 'opening, h, for the projection g to pass through, and a spring, t', which is attached to the up right d, has a tendency to keep the projection g within the cone c. r

The cone c is inserted in the hole in the mold, which receives the metal for the pin or projection a, the lever f being (during the insertion of the cone) out from the upright d and the projee'tion'g withinthe cone, and, when the'cone is iitted snugly in the mold, the upper part of the 'lever fis pressed toward the upright d, and the projection g forced out through the opening h into the sand-mold, as shown clearly in Fig. 2, O representing the mold. The lever f is then released, and the spring i throws back the projection g into the cone, and the latter is withdrawn from the mold, the hole in the sand made by g admitting of the spur b being cast. This will be fully understood by referring to Figs. l and 2.

In Fig. 3, D represents a cover of a kettle, and E a portion of the top of a kettle, to which the cover is attached by a swivel-joint, the latter being composed of a pendent pin or projection, j, having two spurs, k k, extending'laterally from it at opposite points, said pin extending through the top of the kettle E, with the spurs k k below it, slots being made in the top of E for the spurs to pass through.

The mold F, in which the cover D is cast, is formed with a pattern, as usual, and the holes in the mold for casting the spurs k kare made by a tool, H, (see Fig. 4,) constructed substan-- tially the same as that exhibited in Fig. 2. This tool H is composed of a cylinder, I, having within it a rod, l, at the lower end of which there is a flat projection, 1n, the latter extending out at equal distances from opposite sides of the rod l.

The rod lis tted loosely on a shaft, 1t, which is placed transversely in the cylinder I, said shaft passing through vertical oblong slots 0 in the side of the cylinder.

A spiral spring, p, which is fitted within the cylinder I, bears against the shaft 1l, and when the rod l is not pressed down keeps the project-ion 1n above openings 1p 1^ in the side of a cone, s, at the lower end of a cylinder, I. In order, therefore, to form the holes in the mold to cast the spurs 7c k, the cone s is inserted in the hole in the mold F made for the casting ofthe pin j, and the rod l pressed down and moved laterally, irst in one direction and then in the other, so that the projection 1n will be forced through both openin gs 1' 1` and the necessary holes made in the mold, the rod then being adjusted in a vertical position, so that the spring p will force it up and the projection 1n above the openings 1^, and the tool is then withdrawn from the mold.

Fig. 5 shows a portion ot` the bottom plate, J, of a stove, with a leg, K, attached. This attachment is formed by a dovetail slide, as usual, the upper part of the leg being cast with a taper nat portion, 1t, having beveled edges 1) 1;, which arc tted between beveled lugs 1v 10, at the under side of J. The holes in the mold L to cast these lugs are made with a tool, M, (see Figs. 6 and 7,) composed of a plate, a', having two slides, b b', tted in it, said slides being provided with projections c', which extend below the plate a', and correspond in shape with the lugs to be cast.

Theprojections c are kept within fixed pendent projections d' at the under side of plate a by spiral springs e e', which bear against the slides b', (see Fig. 7,) and when the plate a is placed on the mold, and the xed projections d forced down therein, the slides b b are pressed toward each other and the projections c' forced out from the fixed projections d, the proper holes being thereby made in the mold for casting the lugs 10 10. Thus, by this simple means, catches of fastenings for the purpose specified may be made without any tiling or other manipulation whatever after casting.

I claim as new and desire to secure by Letters Patent- 1. The hand-tool B, for forming the mold in which the spur b is cast upon the lug a of a stove-top, consisting of the hollow and slotted cone o, bearing the lever f, hung upon the transverse shaft e, the projection g upon the lower end of said lever being held through the side of the cone by the spring 1 upon the upright d, all arranged and operating as described, for the purpose specified.

2. The tool H, for forming the mold in which the spurs 7c L' are cast upon pin j, consisting of the cylinder I, whose lower end is slotted upon opposite sides at 1' 1', the rod l, having the projecting foot 1n, and hung loosely upon the shaft n, which works in the slots o of the cylinder I, said projecting foot being held above the slots 11 by means of the spring p bearing against the shaft 11, all arranged and operating as described, for the purpose specified.

3. The tool M, for casting the beveled lugs 1U w w upon the stove-plate J, consisting of the plate a', having the slides b' b', provided with projections c c', which are kept within the projections d by mea-ns of the spiral springs c e', all arranged and operating as described, for the purpose speeied.

The above specication of my invention signed by me.

GEORGE IV. HERRICK.

WYitneSSes:

HENRY H. GIBns, ALBERT L. GIBBs. 

